The High
Pressure High Temperature (HPHT) treatment has been a controversial
topic of discussion in the gem world and will remain in future. The
HPHT treatment is a process developed by General Electric Company used
for diamond color modification that uses to grow synthetic diamonds.
This treatment eliminates the brown color by reducing or removing the
structural distortions or irregularities in some IIa diamonds. The HPHT
treatment may dramatically improve the color and value of brownish diamonds.
Brown diamonds of N to O color on Gemological Institute of America (GIA)
color classification system and even fancy light brown diamonds may
be converted into colorless or near colorless diamonds -. D to H grades
by an annealing process involving HPHT technique. Type Ia diamond color
have yielded fancy Greenish Yellow and Yellowish Green color. Pink and
Blue color diamonds have been produced by the same process. General
Electric is producing colorless diamonds called Bellataire from type
IIa diamonds that are nitrogen free.

The HPHT treatment in diamonds is permanent Most HPHT treated diamonds
are over 0.50 carat. The color enhanced diamonds with HPHT treatment
are reaching in trade undetected and are being sold for a much higher
price. The HPHT treated diamonds should cost less than similar natural
diamonds.

The Federal Trade Commission states that HPHT treatment must be disclosed.
General Electric uses a registration number and the letters. GE
POL  to inscribe their diamonds. The diamonds that are laser inscribed
with words  HPHT PROCESSED, IRRADIATED or a specific
registered name are graded in gem testing laboratories. On detecting
HPHT treated diamonds, GIA certifies the same as HPHT Annealed
or Artificially Irradiated in their grading reports.

Astrologically speaking, only diamonds of natural origin should be used
in astrology.

On doing treatment on Diamonds the energy gets liberated . The Diamond
becomes free from its Soul, Pran, Atma and thus gets polluted or destroyed.
Then it is charged with negative energy which is not useful in astrological
application. The treated diamonds do not serve any purpose for astrological
effects and gains.